The meta-search engine adopts these existing search engines 'query ability, regards them as an unity, and brings users an uniform interface and feedback results. 元搜索引擎利用现有的独立搜索引擎的查询性能,将搜索引擎看成一个整体,为用户提供一个统一的查询界面与返回结果。
The methods of determination bipolar inputting control signal, optic-electron coder feedback signal connecting with MCU, dimension's unity of inputting signal between feedback signal, zero position orientation, and logical drive are proposed and realized. 提出并实现了系统双极性输入控制信号采样、编码器反馈信号与单片机接口、输入信号与反馈信号的量纲统一化、零位定位、以及逻辑驱动等处理方法。